For Early Childhood Education, Tulsa, Okla., Stands Out

Preschool students from Nikki Jones's class at Porter Early Childhood Development Center in Tulsa line up in the hallway on their way back from outside play.

John W. PooleNPR

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Originally published on April 22, 2014 9:54 am

The federal government spends almost $8 billion on preschool programs across the country, mostly on low income 4-year-olds. States spend billions more. But with at least 30 states planning to expand access to pre-K and President Obama promoting "preschool for all," what constitutes a quality preschool program?